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Boiler: Viessmann Vitodens 100-W Questions

My plan is to have a Viessmann Vitodens 100-W boiler with combi-kit installed and exhausted through my masonry chimney using grey IPEX CPVC piping with insulation around it to protect against Toronto weather.

My questions are:

1) I'm considering having the air intake from the surrounding room instead of a separate air intake pipe to the outside. Would there be any concern of CO backdrafting into my house?

2) There is a TSSA regulation that says I would have to "seal the boiler room" for a Category I gas appliance (http://www.scribd.com/doc/40022993/A...ed-Boiler-Room). Am I correct in assuming that this does not apply to the Viessmann Vitodens 100-W, regardless of where the air intake is located?